Yes, the EF 1200 is very rare. But only one person (not me) own a EF 3000. The EF 1200 is very heavy, but for the EF 3000 you need a truck.
I have all the latest L lenses and some other lenses with exeption EF 24-70 L I (sold, you know why), EF 17-40, EF 24-105 IS (sold after 3 days use a few years ago), the EF 500 2.8 II L and two of the tilt-shifts.